Please help me with my assignment..

1. What is the weight of a block of ice 24 in. by 24 in. by 24 in., if the ice weighs 92% as much as water, and water weighs 62.5 lb per cu. ft?

2. Find the area of a triangle whose vertex is at the midpoint of an upper edge of a cube of edge A and whose base coincides with the diagonally opposite edge of of a cube.

3. A vegetable bin built in the form of a cube with an edge of 6ft. is divided by a vertical partition which passes through two diagonally opposite edges. Find the lateral surface of either compartment.

I've already answered some of the problems. But I found this three questions as very confusing, so I hope that I can ask for some help in here..

thaks..